#157: clean

eo-compiler/src/main/antlr4/org/eolang/compiler/Program.g4

@@ -161,6 +161,8 @@ has
 
 data
   :
+  BOOL
+  |
   STRING
   |
   INTEGER
@@ -210,6 +212,7 @@ EOL
 
 NAME: LO (LETTER | DIGIT)*;
 
+BOOL: 'true' | 'false';
 CHAR: '\'' (LETTER | DIGIT) '\'';
 STRING: '"' ('\\"' | ~'"')* '"';
 INTEGER: (PLUS | MINUS)? DIGIT+;

eo-compiler/src/main/java/org/eolang/compiler/XeListener.java

@@ -243,7 +243,10 @@ public void exitHtail(final ProgramParser.HtailContext ctx) {
     public void enterData(final ProgramParser.DataContext ctx) {
         final String type;
         final String data;
-        if (ctx.CHAR() != null) {
+        if (ctx.BOOL() != null) {
+            type = "bool";
+            data = Boolean.toString(Boolean.parseBoolean(ctx.getText()));
+        } else if (ctx.CHAR() != null) {
             type = "char";
             data = ctx.getText().substring(1, 1);
         } else if (ctx.FLOAT() != null) {

eo-compiler/src/test/resources/org/eolang/compiler/packs/full-syntax.yaml

@@ -18,8 +18,8 @@ eo: |
   [x] > first
     second > hello
       third:foo > x
-        f 12
-          (((t 22) r:t 8.54 "yes").print 88):hey > !a
+        f 12 false
+          (((t 22) r:t 8.54 "yes" 'e').print 88):hey true > !a
             kid
       f:u
         z

eo-maven-plugin/pom.xml

@@ -155,6 +155,8 @@ SOFTWARE.
             <artifactId>qulice-maven-plugin</artifactId>
             <configuration>
               <excludes>
+                <exclude>checkstyle:/src/it/.*</exclude>
+                <exclude>pmd:/src/it/.*</exclude>
                 <exclude>duplicatefinder:.*</exclude>
                 <exclude>xml:/src/test/resources/META-INF/maven/plugin.xml</exclude>
               </excludes>

eo-maven-plugin/src/it/fibonacci/invoker.properties

@@ -0,0 +1 @@
+invoker.goals = clean

eo-maven-plugin/src/it/fibonacci/src/main/java/org/eolang/examples/Main.java

@@ -24,7 +24,9 @@
 
 package org.eolang.examples;
 
-import org.eolang.Array;
+import java.util.Arrays;
+import org.eolang.ArgsOf;
+import org.eolang.Entry;
 
 /**
  * Eo entry point.
@@ -39,7 +41,11 @@ public final class Main {
      * @throws Exception In case of failure
      */
     public static void main(final String... args) throws Exception {
-        new app(new Array(args)).call();
+        new app(
+            new ArgsOf(
+                new Entry("args", Arrays.asList(args))
+            )
+        ).call();
     }
 
 }

eo-maven-plugin/src/it/fibonacci/verify.groovy

@@ -0,0 +1,28 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2020 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+// assert new File(basedir, 'target/generated-sources/eo/pixel.java').exists()
+// assert new File(basedir, 'target/generated-sources/eo/pixel$hello.java').exists()
+// assert new File(basedir, 'target/classes/pixel.class').exists()
+// assert new File(basedir, 'target/classes/pixel$hello.class').exists()

eo-maven-plugin/src/main/java/org/eolang/maven/CompileMojo.java

@@ -76,7 +76,7 @@ public final class CompileMojo extends AbstractMojo {
         readonly = false,
         defaultValue = "${project.build.directory}/generated-sources/eo"
     )
-    private transient File generatedDirectory;
+    private transient File generatedDir;
 
     /**
      * Target directory.
@@ -87,7 +87,7 @@ public final class CompileMojo extends AbstractMojo {
         readonly = false,
         defaultValue = "${project.build.directory}"
     )
-    private transient File targetDirectory;
+    private transient File targetDir;
 
     /**
      * Directory in which .eo files are located.
@@ -103,11 +103,11 @@ public final class CompileMojo extends AbstractMojo {
     @Override
     public void execute() throws MojoFailureException {
         StaticLoggerBinder.getSingleton().setMavenLog(this.getLog());
-        if (this.generatedDirectory.mkdirs()) {
-            Logger.info(this, "Directory created: %s", this.generatedDirectory);
+        if (this.generatedDir.mkdirs()) {
+            Logger.info(this, "Gen directory created: %s", this.generatedDir);
         }
-        if (this.targetDirectory.mkdirs()) {
-            Logger.info(this, "Directory created: %s", this.targetDirectory);
+        if (this.targetDir.mkdirs()) {
+            Logger.info(this, "Target directory created: %s", this.targetDir);
         }
         try {
             Files.walk(this.sourcesDirectory.toPath())
@@ -125,11 +125,11 @@ public void execute() throws MojoFailureException {
             );
         }
         this.project.addCompileSourceRoot(
-            this.generatedDirectory.getAbsolutePath()
+            this.generatedDir.getAbsolutePath()
         );
         Logger.info(
             this, "Directory added to sources: %s",
-            this.generatedDirectory
+            this.generatedDir
         );
     }
 
@@ -152,7 +152,7 @@ private void compile(final Path file) {
                     new TeeInput(
                         new InputOf(baos.toString()),
                         new OutputTo(
-                            this.targetDirectory.toPath()
+                            this.targetDir.toPath()
                                 .resolve("eo-compiler")
                                 .resolve(
                                     String.format(
@@ -166,21 +166,21 @@ private void compile(final Path file) {
             ).value();
             new ToJava(
                 new XMLDocument(baos.toString()),
-                this.generatedDirectory.toPath(),
-                this.targetDirectory.toPath().resolve("eo-to-java")
+                this.generatedDir.toPath(),
+                this.targetDir.toPath().resolve("eo-to-java")
             ).compile();
         } catch (final IOException ex) {
             throw new IllegalStateException(
                 new UncheckedText(
                     new FormattedText(
                         "Can't compile %s into %s",
-                        file, this.generatedDirectory
+                        file, this.generatedDir
                     )
                 ).asString(),
                 ex
             );
         }
-        Logger.info(this, "%s compiled to %s", file, this.generatedDirectory);
+        Logger.info(this, "%s compiled to %s", file, this.generatedDir);
     }
 
 }

eo-maven-plugin/src/main/java/org/eolang/maven/ToJava.java

@@ -63,6 +63,7 @@ public final class ToJava {
      *
      * @param input Input text
      * @param file The file to write the XML to
+     * @param tmp Temp dir
      */
     public ToJava(final XML input, final Path file, final Path tmp) {
         this.xml = input;

eo-maven-plugin/src/main/resources/org/eolang/maven/to-java.xsl

@@ -224,6 +224,9 @@ SOFTWARE.
     <xsl:value-of select="text()"/>
     <xsl:text>'</xsl:text>
   </xsl:template>
+  <xsl:template match="o[text() and @base='org.eolang.Bool']">
+    <xsl:value-of select="text()"/>
+  </xsl:template>
   <xsl:template match="node()|@*">
     <xsl:copy>
       <xsl:apply-templates select="node()|@*"/>

eo-maven-plugin/src/test/java/org/eolang/maven/CompileMojoTest.java

@@ -68,11 +68,11 @@ public void testSimpleCompilation() throws Exception {
         ).value();
         final Path target = this.temp.resolve("target");
         this.setVariableValueToObject(
-            mojo, "targetDirectory", target.toFile()
+            mojo, "targetDir", target.toFile()
         );
         final Path generated = this.temp.resolve("generated");
         this.setVariableValueToObject(
-            mojo, "generatedDirectory", generated.toFile()
+            mojo, "generatedDir", generated.toFile()
         );
         this.setVariableValueToObject(mojo, "project", new MavenProjectStub());
         mojo.execute();
@@ -88,10 +88,10 @@ public void testCrashOnInvalidSyntax() throws Exception {
         final Path src = this.temp.resolve("src");
         this.setVariableValueToObject(mojo, "sourcesDirectory", src.toFile());
         this.setVariableValueToObject(
-            mojo, "generatedDirectory", this.temp.resolve("generated").toFile()
+            mojo, "generatedDir", this.temp.resolve("generated").toFile()
         );
         this.setVariableValueToObject(
-            mojo, "targetDirectory", this.temp.resolve("target").toFile()
+            mojo, "targetDir", this.temp.resolve("target").toFile()
         );
         new LengthOf(
             new TeeInput(

eo-runtime/pom.xml

@@ -39,4 +39,22 @@ SOFTWARE.
       <artifactId>cactoos</artifactId>
     </dependency>
   </dependencies>
+  <!--
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.eolang</groupId>
+        <artifactId>eo-maven-plugin</artifactId>
+        <version>0.1</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+  -->
 </project>

eo-runtime/src/main/eo/org/eolang/not.eo

@@ -0,0 +1,6 @@
+# Returns TRUE if argument is FALSE and the other way around
+
++package org.eolang
+
+[x] > not
+  if x false true

eo-runtime/src/main/eo/org/eolang/sub.eo

@@ -0,0 +1,8 @@
+# Calculates algebraic difference between x and y
+
++package org.eolang
+
+[x y] > sub
+  add
+    x
+    mul y -1

eo-runtime/src/main/java/org/eolang/Add.java

@@ -82,6 +82,11 @@ public Object call() {
                 }
             }
         }
+        if (result == null) {
+            throw new ArgsException(
+                "At least one argument required by ADD"
+            );
+        }
         return result;
     }
 }

eo-runtime/src/main/java/org/eolang/Not.java → eo-runtime/src/main/java/org/eolang/ArgsException.java

@@ -25,27 +25,23 @@
 package org.eolang;
 
 /**
- * NOT.
+ * Args Exception.
  *
  * @since 0.1
  */
-public final class Not implements Phi {
+public final class ArgsException extends RuntimeException {
 
     /**
-     * Args.
+     * Serial ID.
      */
-    private final Args args;
+    private static final long serialVersionUID = -6643350804302660951L;
 
     /**
      * Ctor.
-     * @param arg Args
+     * @param reason The reason
      */
-    public Not(final Args arg) {
-        this.args = arg;
+    public ArgsException(final String reason) {
+        super(reason);
     }
 
-    @Override
-    public Object call() {
-        return !this.args.get("01").equals(Boolean.TRUE);
-    }
 }

eo-runtime/src/main/java/org/eolang/ArgsOf.java

@@ -73,7 +73,13 @@ private ArgsOf(final Map<String, Object> args) {
 
     @Override
     public Object get(final String key) {
-        return this.map.get(key);
+        final Object result = this.map.get(key);
+        if (result == null) {
+            throw new ArgsException(
+                String.format("The argument \"%s\" is absent", key)
+            );
+        }
+        return result;
     }
 
     @Override

eo-runtime/src/main/java/org/eolang/If.java

@@ -0,0 +1,57 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2020 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package org.eolang;
+
+/**
+ * IF.
+ *
+ * @since 0.2
+ */
+public final class If implements Phi {
+
+    /**
+     * Args.
+     */
+    private final Args args;
+
+    /**
+     * Ctor.
+     * @param arg Args
+     */
+    public If(final Args arg) {
+        this.args = arg;
+    }
+
+    @Override
+    public Object call() {
+        Object result = false;
+        if (this.args.get("01").equals(Boolean.TRUE)) {
+            result = this.args.get("02");
+        } else if (this.args.has("03")) {
+            result = this.args.get("03");
+        }
+        return result;
+    }
+}